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Share Capital - Additional Information (Detail) - CAD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Classes Of Share Capital [Line Items] |  |
Par value | $ 0 |
Deal offerings [member] | Issued capital [member] |  |
Disclosure Of Classes Of Share Capital [Line Items] |  |
Number of shares issued | 15,677,143 | 13,181,190
Proceeds from issue of ordinary shares | $ 146,032 | $ 34,584
Private placements [member] | Issued capital [member] |  |
Disclosure Of Classes Of Share Capital [Line Items] |  |
Number of shares issued |  | 6,671,111
Proceeds from issue of ordinary shares |  | $ 15,010

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